1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Amanda [17]
2 years ago
11

How many moles of oxygen are needed to react with 87 grams of aluminum

Chemistry
1 answer:
labwork [276]2 years ago
5 0

Answer:

2.4 moles of oxygen are needed to react with 87 g of aluminium.

Explanation:

Chemical equation:

4Al(s)  + 3O₂(l)   → 2AlO₃(s)

Given data:

Mass of aluminium = 87 g

Moles of oxygen needed = ?

Solution:

Moles of aluminium:

Number of moles of aluminium= Mass/ molar mass

Number of moles of aluminium= 87 g/ 27 g/mol

Number of moles of aluminium= 3.2 mol

Now we will compare the moles of aluminium with oxygen.

                              Al         :         O₂

                               4          :         3

                               3.2       :         3/4×3.2 = 2.4 mol

2.4 moles of oxygen are needed to react with 87 g of aluminium.

You might be interested in
Two or more assistance
Goryan [66]
I believe it would be a compound.
4 0
3 years ago
1.What does the Law of Conservation of Energy tells us?
lorasvet [3.4K]
1. Energy can neither be created or destroyed.
2. Conduction. Putting a pot of water on a hot burner. Convection. Putting your wet shoes over an air vent to dry them quicker. Radiation. Sitting in front of the fire to warm your hands up.
3. renewable sources can be used again and again, but non renewable sources cannot.
4. I would recommend solar energy. I think solar energy should be considered because solar energy can be reused, and also because they can use it to power their houses and they wouldn't need fossil fuels to do so.
5. Turn off the lights and open the windows during the day and if something is left plugged into the wall and it is not being used, unplug it.

hope I could help!
4 0
3 years ago
How did Wegener explain why fossils of land animals were found on continents that are across oceans from one another?
slamgirl [31]
He explained that with continental drift
8 0
3 years ago
Read 2 more answers
A 1.67-g sample of solid silver reacted in excess chlorine gas to give a2.21-g sample of pure solid Agcl.The heat given off in t
kotegsom [21]

<u>Given:</u>

Mass of Ag = 1.67 g

Mass of Cl = 2.21 g

Heat evolved = 1.96 kJ

<u>To determine:</u>

The enthalpy of formation of AgCl(s)

<u>Explanation:</u>

The reaction is:

2Ag(s) + Cl2(g) → 2AgCl(s)

Calculate the moles of Ag and Cl from the given masses

Atomic mass of Ag = 108 g/mol

# moles of Ag = 1.67/108 = 0.0155 moles

Atomic mass of Cl = 35 g/mol

# moles of Cl = 2.21/35 = 0.0631 moles

Since moles of Ag << moles of Cl, silver is the limiting reagent.

Based on reaction stoichiometry: # moles of AgCl formed = 0.0155 moles

Enthalpy of formation of AgCl = 1.96 kJ/0.0155 moles = 126.5 kJ/mol

Ans: Formation enthalpy = 126.5 kJ/mol


6 0
3 years ago
Read 2 more answers
Help me on this question, will give brainliest.
JulsSmile [24]
The answer is to this question is c
6 0
2 years ago
Other questions:
  • What is the molarity of a solution of Cu2SO4 if 250.0 mL of solution contains 14.1 g of Cu2SO4?
    6·2 answers
  • por favor es urgente!!!!!!!!.... 1 -¿cuántos átomos- gramos de cloro hay en 88,75 g de dicho elemento? 2-¿calcular los moles de
    9·1 answer
  • A boy has a few bottles of soft drink in his restaurant. But ,unfortunately,these are not labelled.He has to serve the drinks on
    9·1 answer
  • All matter is made up of atoms that are in continuous, random motion
    9·1 answer
  • Which properties makes a metal a good material to use for electrical wires?
    9·2 answers
  • Please help! How many grams is 4.5 x 10^27
    12·1 answer
  • Which color of visible light has the highest energy?
    12·1 answer
  • Differences Between Eating Clean to Prevent a Heart Attack and Keeping Drains Clean to Prevent Clogged Pipes
    8·2 answers
  • Do you think it matters if you
    10·1 answer
  • The Newton is the SI unit for ____.<br> temperature<br> density<br> weight<br> mass
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!